Use of isotopes in determining occult blood.
D002840:Chromates; D002859:Chromium Isotopes / Q000032:analysis*; D005243:Feces / Q000032:analysis*; D006471:Gastrointestinal Hemorrhage / Q000139:chemically induced / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008722:Methods; D009780:Occult Blood; D012964:Sodium
D002840:Chromates; D002859:Chromium Isotopes; D012964:Sodium